Scissors-sharpening attachment for grinding-machines.



A. G. RODGERS. SCISSORS SHARPENING ATTAGHMENTFOR GRINDING MACHINES.

APPLICATION FILED JULY 12, 1912.

1,068, 39 1. L Patented June 3, 1913.

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G. RODGERS, F NIAGARA FALLS, NEW YORK, ASSIGNOR TO THE CARBO- V j EUNDUM COMPANY, OF NIAGARA FALLS, NEW YORK, A CQRPORA'IION OF PENN- SYLVANIA.

SCIS SO' RS-SHARPENING ATTACHMENT FOR GRINDING-MACHINES.

To all w/wmit may concern:

Be it known that I, Asinrrlm G. Rononus, a 0t hiagara Falls, hiagara county, and'bt-ate of New York, have invented a new and useful Improvement in Scissors-Sharpening Attachments for Grinding- Machines, of which the followin is a full, clear, and exact description, rei erence being had to the accompanying drawings, forming part of this specification, in which' Figure l is a front elevation of a machine embodying my invention. Fig. 2 is a side view of the same; F 3 is a plan view, and Fig. l is a detail view of the scissors holding clamp. I

My invention has relation to attachments for grinding machines for holding tools to be. sharpened, and more particularly de signed for use in sharpening scissors, shears, etc.

The object of my invention is to provide a simple and convenient attachment of this character, designed to be hand manipulated, and capable of universal movement with respect to the grinding face of the grinding wheel.

In the accompanying drawings, the numeral 2 designates the grinding wheel, which may be of any suitable character and which is mounted in a suitable bearing 3 in a frame 4:. This frame is shown as having a clamp by means of which can be detachably secured to any suitable support 6. T is the handle of the machine which turns the'wheel 2 through the multiplying gears 8.

In the preferred form of my attachment which I have illustrated, it ccanpriscs a base plate 9 which is adapted to be inserted between the upper surface of the support 6 and the upper lugs or jaws of the clamp 5, to be thereby secured when the grinding machine is clamped to the rapport. This plate has the upwardly projecting pivot lugs 10 between which is pivoted a bar member 11. Pivoted to thisbar member arctu'o parallel links 12 connected at their upper ends by a transverse link 13. to which i pivoted the tool holding clamp. This amp shown as con ,Ling i provided with a clamping The parallel l nks 1:? are plt. adjustable in length; and for i the bent jaws l-t and l5,

Specification of Letters Patent.

the transverse link Patented June 3, 1913.

Application filed July 12 1912. Serial No. 709,046.

the shears or scissors to be sharpened is secured between'the jawsH and 15 in the manner shown in Figs. 2, 3 and 4, and the attachmentis swung upwardly on its pivotal connection with'the ba'se plat-e9into the position illustrated in the. drawings. The attachment is manipulated by the hand to bring the edge ofthe tool to be sharpened into the desired position against the face of the grinding wheel and the pressure is also regulated by the hand of the operator.

The pivotal connection between the attachment and the base plate 9 provides for bodily movement toward and away from the grinding face of the wheel 2: the i t d link members 12 and 13 provide for movement parallel with such grinding face and also for vertical adjustment; and the pivotal connection of the tool holding clamp with 13 provides for an angular movement of the clamp and tool with respect to the grinding face.

My invention provides a simple form of attachment which can be readily applied to various types of grinding machines and which provide convenient means for holding and accurately grinding scissors, shears and other bevel edged tools; or straight edged tools.

The angle of the cut on the edge of the tool may be varied by shifting the adjust-- ing plate 5 inwardly or outwardly with re lation. to the grinding machine, or by adjus ing the position of the tool .to be ground with relation to the jaws 1t and 15.

Owing to the universal movementwhich is permitted the tool. holding clampand tool, the tool can be readily manipulated by the operator.

I do not limit myself to the particular cmistrnction of the attachment which I have herein shown and dc cribed. and it is obvious that the details may be changed in various \vavs; for instance, a different form of ham plate may be used, as well as one or more links. which may be parallel or not.

The attachment may be secured to the grinder in other ways; the form of the tool holding clamp may be varied and'other details may be changed.

What I claim is:

1. A tool holding attachment for grinding Wheels, comprising a member adapted to be secured in fixed relation to a grinding wheel, a bar'member pivoted to said member, a frame pivoted to the bar member and arranged to swing at right angles to the movement of the bar member, and a tool holding clamp pivoted to the upper end of the frame; substantially as described.

2. A tool holding attachment for grinding machines, comprising a base member adapted to be secured in fixed relation to the ing machines, comprising a' base member adapted to be secured in fixed re1at1on"to the grinding machine, a horizontal member pi'votally mounted in said 'basemember, links pivoted to the rotary member, the axis of said links being at right angles to the axis of the horizontal member, a tool holding clamp carried by said links, and means for adjusting the length of said links; substantially as described.

4. An attachment for grinding machines, comprising a parallel movement frame pivoted to move toward'and awayirom and across the face of a grinding wheel, and a 4 tool holdingclamp pivotally su ported on the said frame; substantially as escribed.

In testimony whereof,I have hereunto set my hand. V

' ASHMEAD G. RODGERS.-

Witnesses:

SAMUEL J. DEVLIN, 4 C. S. DOUGLAS. 

